diff --git a/doc/.known-issues/doc/hypercall.conf b/doc/.known-issues/doc/hypercall.conf
index b18d3d8e9..2bfe3c1ad 100644
--- a/doc/.known-issues/doc/hypercall.conf
+++ b/doc/.known-issues/doc/hypercall.conf
@@ -23,7 +23,7 @@
 ^[- \t]*\^
 #
 ^(?P<filename>[-._/\w]+/api/hypercall_api.rst):(?P<lineno>[0-9]+): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]
-^.*union hc_ptdev_irq::\@1  hc_ptdev_irq::is
+^.*union hc_ptdev_irq::\@[01]  hc_ptdev_irq::is
 ^[- \t]*\^
 ^(?P=filename):(?P=lineno): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]
 ^[ \t]*